Memorial Day Breakfast Casserole
This hearty Memorial Day breakfast casserole is the ultimate crowd-pleaser for your holiday morning — cheesy, filling, and almost entirely hands-off. Perfect for feeding a hungry crew before the backyard fun begins.
Honestly, this recipe saved me one Memorial Day when I had eight guests sleeping over and zero desire to flip pancakes at 7 a.m. One dish, one oven, zero stress — and everyone went back for seconds.
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Why This Easy Breakfast Casserole Is a Holiday Game-Changer
This baked egg casserole hits every note you want in a holiday morning dish. You’ve got crispy hash browns on the bottom, savory browned sausage in the middle, and a gloriously golden cheese crust on top.
It’s the kind of dish that makes your whole kitchen smell incredible while you’re still in your pajamas. And because it bakes for over an hour, you actually get to enjoy your coffee — imagine that.
Whether you’re hosting a full Memorial Day cookout crowd or just want a relaxed morning with family, this easy breakfast casserole delivers big flavor with minimal effort.
Ingredients
Here’s everything you need, grouped so shopping is a breeze. No fancy ingredients — just good, honest comfort food staples.
| Category | Ingredient | Amount |
|---|---|---|
| Base | Frozen hash brown potatoes, thawed | 1 (2 lb) package |
| Protein | Sausage | 1 pound |
| Aromatics | Small onion, diced | 1 |
| Egg Mixture | Large eggs | 5 |
| Egg Mixture | Milk | 1/2 cup |
| Seasonings | Onion powder | 1/2 tsp |
| Seasonings | Garlic powder | 1/8 tsp |
| Seasonings | Salt and black pepper | To taste |
| Cheese | Shredded Cheddar cheese | 12 oz |
Quick Overview
This Memorial Day Breakfast Casserole is a layered, baked egg casserole with hash browns, sausage, and loads of cheddar cheese. It’s warm, hearty, and satisfying in every single bite.
The best part? You can prep parts of it the night before, making it a true make-ahead breakfast that takes the chaos out of holiday mornings. Just assemble, refrigerate, and bake when ready.
Step-by-Step Instructions
Step 1 — Get Everything Ready
Gather all your ingredients before you start. There’s nothing worse than realizing you forgot to thaw the hash browns halfway through cooking. Trust me, ask me how I know.
Preheat your oven to 350 degrees F (175 degrees C) and grease a deep-sided 8×8-inch square baking pan. This is where all the magic happens.
Step 2 — Build the Hash Brown Base
Add your thawed hash brown potatoes to the greased pan and spread them into an even layer. Press them down gently so they form a nice, compact base.
This potato layer is what gives the casserole that satisfying, hearty foundation. It soaks up all the egg mixture beautifully as it bakes.
Pro tip: Make sure your hash browns are fully thawed and pat them dry if they seem watery. Excess moisture is the enemy of a crispy bottom layer.
Step 3 — Brown the Sausage and Onion
Place your sausage and diced onion in a large skillet over medium heat. Cook and stir until the sausage is browned and crumbled, about 10 minutes. Drain any excess fat.
The smell at this stage is just incredible — savory, oniony, and deeply satisfying. Your guests will start drifting into the kitchen without being asked.
If you want a leaner option, you can easily swap in turkey sausage here. It works beautifully and keeps things a little lighter for the holiday.
Step 4 — Whisk the Egg Mixture
In a large bowl, whisk together the eggs, milk, onion powder, garlic powder, salt, and pepper until everything is fully combined and slightly frothy.
Don’t rush this step. A well-whisked egg mixture means a fluffier, more evenly cooked baked egg casserole in the end. Thirty extra seconds of whisking is worth it.
Step 5 — Layer It All Up
Pour your egg mixture evenly over the hash brown base. Then sprinkle half of your shredded cheddar over the top — try not to eat it all straight from the bag.
Add the cooked sausage and onion mixture next, spreading it into an even layer. Finish by sprinkling the remaining cheddar on top. Cover the whole pan tightly with aluminum foil.
Step 6 — Bake to Golden Perfection
Bake in your preheated oven for 1 hour covered. Then remove the foil and bake for another 10 minutes until a knife inserted in the center comes out clean.
That final uncovered bake is what gives you that gorgeous, slightly crispy cheese crust on top. It goes from good to seriously impressive in those last ten minutes.
Step 7 — Let It Rest
Let the casserole stand for 5 minutes before serving. This helps it set up so you get clean, beautiful slices instead of a saucy mess on the plate.
Use this time to pour the coffee, set the table, and accept compliments gracefully. You’ve earned it.
Expert Tips, Variations, and Troubleshooting
Make It Ahead the Night Before
This is hands-down the best feature of this make-ahead breakfast casserole. Assemble everything the night before, cover tightly with foil, and refrigerate overnight.
In the morning, just pull it out while the oven preheats and add about 10 extra minutes to the baking time since it’s starting cold. That’s genuinely it.
Flavor Variations Worth Trying
Swap cheddar for pepper jack if you want a little kick. Crumbled bacon works instead of sausage if that’s your preference — just cook it fully first and drain well.
You can also toss in diced bell peppers, mushrooms, or spinach with the onion for a veggie boost. This casserole is very forgiving and loves a little customization.
Want to keep things on the lighter side? Check out these healthy banana oatmeal bars as a sweet companion on your holiday breakfast spread.
Troubleshooting Common Issues
If your casserole seems watery after baking, the culprit is usually excess moisture in the hash browns. Always thaw and pat them dry before using.
If the center isn’t fully set at the 70-minute mark, just keep baking in 5-minute increments. Oven temperatures vary, and a clean knife test is your best guide — not the clock.
Cheese burning before the center is cooked? Re-cover loosely with foil for the last stretch of baking. Easy fix, no drama.
Storage Instructions
| Method | Duration | Notes |
|---|---|---|
| Refrigerator | Up to 4 days | Store in an airtight container or cover pan tightly |
| Freezer | Up to 2 months | Wrap individual portions in plastic wrap, then foil |
| Room Temperature | 2 hours max | Do not leave out longer — food safety first |
Reheating Tips
To reheat from the fridge, microwave individual portions for 1–2 minutes or warm the whole pan in a 325 F oven for about 20 minutes, covered with foil.
From frozen, thaw overnight in the fridge first, then reheat as above. The texture stays surprisingly good even after freezing.
No-Waste Kitchen Ideas
Leftover casserole makes a killer breakfast burrito filling — just scoop it into a warm tortilla with some salsa. Honestly, sometimes I make extra just for this purpose.
It also works great crumbled over a simple green salad for a hearty brunch-style lunch. Don’t let those leftovers go to waste — they’re too good for that.
If you love easy, no-waste entertaining, you’ll also love this homemade pimento cheese — perfect for making Memorial Day snacks from pantry staples.
Nutritional Information
Based on 6 servings. Values are approximate and can vary based on specific brands and ingredients used.
| Nutrient | Per Serving |
|---|---|
| Calories | ~620 |
| Protein | ~32g |
| Total Fat | ~42g |
| Saturated Fat | ~18g |
| Carbohydrates | ~28g |
| Fiber | ~2g |
| Sodium | ~980mg |
Frequently Asked Questions
Can I make this Memorial Day Breakfast Casserole ahead of time?
Absolutely — this is actually one of the best make-ahead breakfast recipes out there. Assemble everything the night before, cover tightly, and refrigerate. Bake in the morning with a little extra time added.
This makes it perfect for holidays when you want to enjoy your morning instead of spending it all in the kitchen.
Can I use fresh potatoes instead of frozen hash browns?
Yes, you can shred fresh potatoes and use them in place of frozen. Just make sure to squeeze out as much moisture as possible using a clean kitchen towel before adding them to the pan.
Excess moisture is the main reason casseroles turn out soggy, so this step is essential whether you use fresh or frozen.
How do I know when the baked egg casserole is fully cooked?
The best test is inserting a knife or thin skewer into the center of the casserole. If it comes out clean with no wet egg mixture clinging to it, you’re good to go.
The top should also be golden and slightly puffed. Every oven runs a little differently, so always trust the knife test over the timer.
Can I make this easy breakfast casserole vegetarian?
Definitely. Just leave out the sausage and double up on veggies like bell peppers, spinach, mushrooms, or zucchini. The baked egg casserole base is incredibly versatile.
You can also use a plant-based sausage alternative — they work really well here and you’d barely notice the difference once everything is baked together.
What else can I serve alongside this for a Memorial Day spread?
This casserole pairs beautifully with a fresh fruit salad or some light, sweet bites. These cucumber cream cheese tea sandwiches make a lovely, refreshing contrast to the rich, savory casserole.
For something sweet to round out the table, this lemon icebox pie is a total crowd-pleaser and requires zero baking on the day.
Final Thoughts
This Memorial Day Breakfast Casserole is the kind of recipe that earns you a permanent spot as the favorite holiday host. It’s warm, cheesy, deeply satisfying, and practically makes itself.
Whether you’re feeding a big family crowd or just want a laid-back morning with zero stress, this easy breakfast casserole checks every box. Make it ahead, sleep in a little, and let the oven do the work.
If you try this recipe, I’d absolutely love to hear how it went! Leave a comment below with your experience, any fun variations you tried, or questions you have.
Loved this recipe? Save it to your Pinterest boards so you can find it again next year — and share it with a friend who deserves a stress-free holiday morning.
Memorial Day Breakfast Casserole
Equipment
- 8×8-inch deep-sided baking pan
- Large skillet
- Large mixing bowl
- Whisk
- Aluminum foil
Ingredients
Base
- 1 2 lb package Frozen hash brown potatoes thawed
Protein
- 1 lb Sausage
Aromatics
- 1 Small onion diced
Egg Mixture
- 5 Large eggs
- ½ cup Milk
Seasonings
- ½ tsp Onion powder
- ⅛ tsp Garlic powder
- Salt and ground black pepper to taste
Cheese
- 12 oz Shredded Cheddar cheese divided
Instructions
- Gather all ingredients and ensure your hash brown potatoes are fully thawed. Pat them dry if they seem watery to avoid a soggy base.
- Preheat the oven to 350°F (175°C). Grease a deep-sided 8×8-inch square baking pan. Add the thawed hash brown potatoes and press them into an even, compact layer across the bottom.
- Place the sausage and diced onion in a large skillet over medium heat. Cook and stir until the sausage is browned and crumbled, about 10 minutes. Drain any excess fat.
- Meanwhile, whisk the eggs, milk, onion powder, garlic powder, salt, and pepper together in a large bowl until well combined and slightly frothy.
- Pour the egg mixture evenly over the hash brown layer. Sprinkle half of the shredded Cheddar cheese on top.
- Add the cooked sausage and onion mixture on top, spreading it into an even layer. Sprinkle the remaining Cheddar cheese over everything. Cover the pan tightly with aluminum foil.
- Bake in the preheated oven for 1 hour. Remove the foil and return the casserole to the oven. Bake until a knife inserted into the center comes out clean, about 10 more minutes.
- Let the casserole stand for 5 minutes before slicing and serving. This allows it to set up for clean, neat portions.
